When you can use the Surveil for card selection in addition to countering a spell, it'll feel especially good
Jace's Ingenuity draws you three cards but costs you one card, netting you two
Cards like Scute Swarm or Rabble Rousing can put so many creatures on board that your opponents won't be able to defend against a giant Devilish Valet
I say this because its difficult to surmise some of the inclusions where flex slots exist, such as Forbidden Crown versus Forbidden Droplet, or something like Saryuja Skull Dread in the Extra Deck as a means of de-clogging multiple spare GMX Monsters or Oviraptors from your hand
While unlimited copies of this card are fairly inexpensive, you'll need to spend at least $15 on a damaged first edition copy, with heavily played (HP) cards ranging from $18 to $31
I found it so because I was playing Dimir Rogues, a deck that relies on evasive creatures with flying that had a somewhat hard time beating other aggressive decks